Company XYZ is designing the network for IPv6 security and they have these design requirements:
A switch or router must deny access to traffic from sources with addresses that are correct, but are topologically incorrect Devices must block Neighbor Discovery Protocol resolution for destination addresses that are not found in the binding table.
Which two IPv4 security features are recommended for this company? (Choose two)

• A.IPv6 Destination Guard
• B.IPv6 RA Guard
• C.IPv6 Source Guard
• D.IPv6 DHCP Guard
• E.IPv6 Prefix Guard

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Company XYZ, a global content provider, owns data centers on different continents. Their data center design involves a standard three-layer design with a Layer 3-only core. HSRP is used as the FHRP. They require VLAN extension across access switches in all data centers, and they plan to purchase a Layer 2 interconnection between two of their data centers in Europe. In the absence of other business or technical constraints, which termination point is optimal for the Layer 2 interconnection?

• A.at me aggregation layer because it is the Layer 2 to Layer 3 demarcation point
• B.at the core layer, to otter the possibility to isolate STP domains
• C.at the access layer because the STP root bridge does not need to align with the HSRP active node.
• D.at the core layer because all external connections must terminate there for security reasons

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A senior network designer suggests that you should improve network convergence times by reducing BGP timers between your CE router and the PE router of the service provider. Which two factors should you consider to adjust the timer values? (Choose two.)

• A.service provider agreement to support tuned timers
• B.number of VRFs on the PE router
• C.manual updates to the peer groups
• D.number of routes on the CE router
• E.service provider scheduling of changes to the PE

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A Tier-3 Service Provider is evolving into a Tier-2 Service Provider due to the amount of Enterprise business it is receiving The network engineers are re-evaluating their IP/MPLS design considerations in order to support duplicate/overlapping IP addressing from their Enterprise customers within each Layer3 VPN. Which concept would need to be reviewed to ensure stability in their network?

• A.Assigning unique Route Target ID'S
• B.Assigning unique Route Distinguishers
• C.Assigning unique IP address space for the Enterprise NAT/Firewalls
• D.Assigning unique VRF ID's to each L3VPN

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You want to mitigate failures that are caused by STP loops that occur before UDLD detects the failure or that are caused by a device that is no longer sending BPDUs. Which mechanism do you use along with UDLD?

• A.Root guard
• B.BPDU filtering
• C.BPDU guard
• D.Loop guard

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